mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 00:48:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

[3.13] gh-130959: Reject whitespace in fractions, in pure Python fromisoformat() (#130962) (#131076)

Browse source 
gh-130959: Reject whitespace in fractions, in pure Python `fromisoformat()` (#130962)

Fix the pure Python implementation of `fromisoformat()` to reject any
non-digit characters, including whitespace, in the fractional part
of time specification.  This makes the behavior consistent with the C
implementation, and prevents incorrect parsing of these fractions
(e.g. `.400 ` would be misinterpreted as `.04`).

Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
Co-authored-by: Paul Ganssle <1377457+pganssle@users.noreply.github.com>
(cherry picked from commit 33494b4d0d)

Co-authored-by: Michał Górny <mgorny@gentoo.org>
This commit is contained in:
Victor Stinner 2025-03-11 12:39:27 +01:00 • committed by GitHub
parent 68a1591bec
commit 27fd328cf6
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
3 changed files with 11 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

5
Lib/_pydatetime.py
View file

@ -402,6 +402,8 @@ def _parse_hh_mm_ss_ff(tstr):
raise ValueError("Invalid microsecond component")
else:
pos += 1
if not all(map(_is_ascii_digit, tstr[pos:])):
raise ValueError("Non-digit values in fraction")
len_remainder = len_str - pos
@ -413,9 +415,6 @@ def _parse_hh_mm_ss_ff(tstr):
time_comps[3] = int(tstr[pos:(pos+to_parse)])
if to_parse < 6:
time_comps[3] *= _FRACTION_CORRECTION[to_parse-1]
if (len_remainder > to_parse
and not all(map(_is_ascii_digit, tstr[(pos+to_parse):]))):
raise ValueError("Non-digit values in unparsed fraction")
return time_comps